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Finding the Fourth Proportional to 625,398.56, 863,066.40 and 383,815.04

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Solution

The fourth proportional to 625,398.56, 863,066.40 and 383,815.04 is: 529,674.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,398.56 : 863,066.40 = 383,815.04 : x
  2. Step 2: Convert to fraction form
    625,398.56/863,066.40 = 383,815.04/x
  3. Step 3: Cross multiply
    625,398.56x = 863,066.40 × 383,815.04
  4. Step 4: Simplify right side
    625,398.56x = 331,257,864,838.66
  5. Step 5: Solve for x
    x = 331,257,864,838.66/625,398.56
  6. Step 6: Final answer
    x = 529,674.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.